Hong Keehoon, Hong Jisoo, Jung Jae-Hyun, Park Jae-Hyeung, Lee Byoungho
1School of Electrical Engineering, Seoul National University Gwanak-Gu Gwanakro 599, Seoul 151-744, Korea.
Opt Express. 2010 May 24;18(11):12002-16. doi: 10.1364/OE.18.012002.
We propose a new method for rectifying a geometrical distortion in the elemental image set and extracting an accurate lens lattice lines by projective image transformation. The information of distortion in the acquired elemental image set is found by Hough transform algorithm. With this initial information of distortions, the acquired elemental image set is rectified automatically without the prior knowledge on the characteristics of pickup system by stratified image transformation procedure. Computer-generated elemental image sets with distortion on purpose are used for verifying the proposed rectification method. Experimentally-captured elemental image sets are optically reconstructed before and after the rectification by the proposed method. The experimental results support the validity of the proposed method with high accuracy of image rectification and lattice extraction.
我们提出了一种新方法，用于校正元素图像集中的几何失真，并通过投影图像变换提取精确的透镜晶格线。通过霍夫变换算法来发现采集到的元素图像集中的失真信息。利用这些初始失真信息，通过分层图像变换过程，无需关于采集系统特性的先验知识，就能自动校正采集到的元素图像集。故意带有失真的计算机生成元素图像集用于验证所提出的校正方法。通过所提出的方法对实验采集的元素图像集在校正前后进行光学重建。实验结果以图像校正和晶格提取的高精度支持了所提出方法的有效性。
